#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>
int main()
{
	char c[20];

	int i = 0;
	char ch;
	while ((ch=getchar()) != '@')
	{
		c[i] = ch;
		i++;
	}

	c[i] = '\0';
	for (i; i >= 0; i--)
	{
		if (c[i] >= 'A' && c[i] <= 'Z')
			c[i] = c[i] + 32;
		if (c[i] >= 'a' && c[i] <= 'z')
		{
			if (c[i] == 'z')
				c[i] = 'a';
			else
				c[i] = c[i] + 1;
		}
	}

	printf("%s", c);
	return 0;
}